1952 was born in Hong Kong, and his ancestral home is Shunde, Guangdong. He graduated from the University of Hong Kong in 1973 with a bachelor's degree in social science. 1982, he took a management development course at Harvard Business School. 1999, he studied advanced management course at Harvard Business School.

Before he became the Financial Secretary on May, 2000 1, he held senior management positions in several large international banks in Hong Kong. In public service, he served as an unofficial member of the Executive Council from July 1997 to April 2000. From June 2002 to July 2003, he served as the Financial Secretary of the Hong Kong SAR Government.

He was the Chairman of the Education Commission, the Chairman of the University Grants Committee, a member of the Exchange Fund Advisory Committee, a director of the Airport Authority and the Provisional Airport Authority, and a director of the Hong Kong Futures Exchange.

1994 won the Hong Kong Outstanding Management Award. 1999 was awarded the gold bauhinia star by the Hong Kong SAR Government.

Liang Jinsong loves golf. His wife is China diver Fu Mingxia.